Go with the sony PD170.
1. $3000.00 great price compared to the $5000.00 cannon XL2 (For an additional $800.00 you can buy a true 16x9 lens for the Sony PD170)
2. Has the best low light capabilities of all mini DV cameras.
3. Tons of manual controls. (Shutter speed, f-stops, zoom, focus, etc)...